I tried to install chat for confluence app, using this link as reference https://my.atlassian.com/addon/success?type=try&addOnKey=confluence.chat&addOnName=Chat+for+Confluence&addOnSen=L18196796&licenseId=18196796&parentName=Confluence+%28Server%29&referrer=pac&callback=&licensefieldname= . It says to download the file and upload the file in "manage apps". I am unable to upload the downloaded file, it is asking for descriptor URL, I don't know where to find it.
Can anyone help me with this installation?